I got the SE/Zartan set, want to get the Serpentor set, and now the Shipwreck and Gung-Ho sets

Beachhead vs. Serpentor is the only set I'm missing. Gung-Ho comes with Ceremonial Cowl Cobra Commander and Shipwreck comes with a Crimson Guard. Only Gung-Ho and Shipwreck's packs are from the cancelled Wave 3 which you will have a hard time finding... Good luck and I hope you get and enjoy them!